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Articles by Goki Eda
Electrical control of induced magnetism in an air-stable two-dimensional semiconductor
Abstract INTRODUCTION RESULTS DISCUSSION MATERIALS AND METHODS Acknowledgments Supplementary Materials REFERENCES Information & Authors Metrics & Citations View Options References Figures Tables Media Share This article has 0 eLetter . Abstract Dilute magnetic semiconductors (DMSs) provide a platform for electrically controlling spin interactions; however, conventional systems face limited gate tunability and structural disorder.
Point-like photovoltaic junction in 2D semiconductor homobilayer
Abstract Atomically thin semiconductor junctions offer a platform for probing optoelectronic processes beyond the continuum limit, where reduced screening and strong exciton binding make local fields especially important for charge separation. Yet it remains unclear how individual dopants contribute to the photovoltaic response when the junction thickness becomes comparable with the atomic length scales and smaller than conventional depletion or diffusion lengths.
Opto-optical edge defect mitigation in solution-processed WSe 2 thin films for high-efficiency optical modulation
Abstract Two-dimensional optical modulators often suffer from low efficiency due to defect-induced losses and light–matter interaction strength. Here we show that edge defects in solution-processed WSe2 nanosheets, arising from metallic 1 T domains at the edges and semiconducting 2H interiors, can be dynamically saturated through carrier trap filling.
Ferroelectric brightening of spin‑forbidden dark excitons in a WSe 2 /hybrid-perovskite heterostructure
Abstract Long-lived dark excitons in monolayer WSe2 present promising candidates for carrying spin and valley information, but their optical access and spin manipulation have conventionally required the use of strong external magnetic fields. Here, using a ferroelectric hybrid perovskite heterostructure, we leverage the ferroelectric proximity effect to break the WSe2’s in-plane rotational symmetry and brighten the spin-forbidden dark excitons under zero magnetic field conditions.
Ultrabroadband nonlinear Hall rectifier using SnTe - Nature Nanotechnology
Abstract The rapid expansion of self-powered electronics in the Internet of Things, 6G communication and millimetre-wave systems calls for rectifiers capable of operating across ultrabroadband frequencies and at extremely low input power levels. However, conventional rectifiers based on semiconductor junctions face fundamental limitations such as parasitic capacitance and threshold voltages, preventing effective operation under broadband and ambient radio-frequency conditions.
Energy transfer driven brightening of MoS2 by ultrafast polariton relaxation in microcavity MoS2/hBN/WS2 heterostructures - Nature Communications
Abstract Energy transfer is a ubiquitous phenomenon that delivers energy from a blue-shifted emitter to a red-shifted absorber, facilitating wide photonic applications. Two-dimensional (2D) semiconductors provide unique opportunities for exploring novel energy transfer mechanisms in the atomic-scale limit. Herein, we have designed a planar optical microcavity-confined MoS2/hBN/WS2 heterojunction, which realizes the strong coupling among donor exciton, acceptor exciton, and cavity photon mode.
Phase-selective in-plane heteroepitaxial growth of H-phase CrSe2 - Nature Communications
Abstract Phase engineering of two-dimensional transition metal dichalcogenides (2D-TMDs) offers opportunities for exploring unique phase-specific properties and achieving new desired functionalities. Here, we report a phase-selective in-plane heteroepitaxial method to grow semiconducting H-phase CrSe2. The lattice-matched MoSe2 nanoribbons are utilized as the in-plane heteroepitaxial template to seed the growth of H-phase CrSe2 with the formation of MoSe2-CrSe2 heterostructures.
Reply to: Mobility overestimation in molybdenum disulfide transistors due to invasive voltage probes - Nature Electronics
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replying to P.
By Du Xiang, Ady Suwardi, Tao Liu, Huajun Liu, Qiang Zhu, Zhaogang Dong, Goki Eda, Ming Yang Verified
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Nature
Verified
Probing spin dynamics of ultra-thin van der Waals magnets via photon-magnon coupling - Nature Communications
Abstract Layered van der Waals (vdW) magnets can maintain a magnetic order even down to the single-layer regime and hold promise for integrated spintronic devices. While the magnetic ground state of vdW magnets was extensively studied, key parameters of spin dynamics, like the Gilbert damping, crucial for designing ultra-fast spintronic devices, remains largely unexplored.
Ultrathin quantum light source with van der Waals NbOCl2 crystal - Nature
Author notes These authors contributed equally: Qiangbing Guo, Xiao-Zhuo Qi, Lishu Zhang, Meng Gao Authors and Affiliations Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore Qiangbing Guo, Wenjie Zang & Cheng-Wei Qiu Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore Qiangbing Guo & Stephen J.
Electrostatic control of magnetism: Emergent opportunities with van der Waals materials
Loading [MathJax]/jax/output/HTML-CSS/fonts/STIX-Web/fontdata.js Free Appl. Phys. Lett. 121, 060501 (2022); https://doi.org/10.1063/5.0107329 Since the first reports on the observation of magnetic order in atomically thin crystals of FePS3, CrI3, and CrGeTe3 in 2016 and 2017, there has been a greatly renewed interest in the magnetism of van der Waals (vdW) layered magnets.
Giant second-harmonic generation in ferroelectric NbOI2 - Nature Photonics
Abstract Implementing nonlinear optical components in nanoscale photonic devices is challenged by phase-matching conditions requiring thicknesses in the order of hundreds of wavelengths, and is disadvantaged by the short optical interaction depth of nanometre-scale materials and weak photon–photon interactions.
Improving carrier mobility in two-dimensional semiconductors with rippled materials - Nature Electronics
Abstract Two-dimensional (2D) semiconductors could potentially replace silicon in future electronic devices. However, the low carrier mobility in 2D semiconductors at room temperature, caused by strong phonon scattering, remains a critical challenge. Here we show that lattice distortions can reduce electron–phonon scattering in 2D materials and thus improve the charge carrier mobility.
Data-driven discovery of high performance layered van der Waals piezoelectric NbOI2 - Nature Communications
Abstract Using high-throughput first-principles calculations to search for layered van der Waals materials with the largest piezoelectric stress coefficients, we discover NbOI2 to be the one among 2940 monolayers screened. The piezoelectric performance of NbOI2 is independent of thickness, and its electromechanical coupling factor of near unity is a hallmark of optimal interconversion between electrical and mechanical energy.
Room-temperature nonlinear Hall effect and wireless radiofrequency rectification in Weyl semimetal TaIrTe4
Abstract The nonlinear Hall effect (NLHE), the phenomenon in which a transverse voltage can be produced without a magnetic field, provides a potential alternative for rectification or frequency doubling1,2. However, the low-temperature detection of the NLHE limits its applications3,4. Here, we report the room-temperature NLHE in a type-II Weyl semimetal TaIrTe4, which hosts a robust NLHE due to broken inversion symmetry and large band overlapping at the Fermi level.
All-electric magnetization switching and Dzyaloshinskii–Moriya interaction in WTe2/ferromagnet heterostructures
Abstract All-electric magnetization manipulation at low power is a prerequisite for a wide adoption of spintronic devices. Materials such as heavy metals1,2,3 or topological insulators4,5 provide good charge-to-spin conversion efficiencies. They enable magnetization switching in heterostructures with either metallic ferromagnets or with magnetic insulators.
Nonlinear optical properties of a one-dimensional coordination polymer
Nonlinear optical materials with functions of generating second harmonic generation (SHG) or/and third harmonic generation (THG) have attracted great interest for their applications in extending coherent light frequencies from given lasers. Here we report on a one-dimensional coordination polymer, which is capable of generating SHG, THG, multi-photon-excited photoluminescence (PL) depending on an excitation wavelength in the range from 800 nm to 1500 nm.
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